From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 8C7EE48E0C6; Mon, 21 Sep 2026 10:57:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789988251; cv=none; b=m9uOjDHaH0FZa5FKbgVlmkcWrcBsH1YHE9QXgxTCSFybChExl/AQksLVHGgYA6z3ZVYLTj0sfnFllLYAFkzVtmYJAerXvwx3/OPE6wB9Ufz6wNer7wzhA5gYX+8JoBXuoXbowOTxCMahYcBfKAYdOTJ6Tbf+cWmNFcH+nT7Umgo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789988251; c=relaxed/simple; bh=ywGIUWe4eG9Fo7o6yUhrB9doRugWRJ87ez63n7dCtOo=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=YdHSymmywU+xZAGK+dpWSB4Dka/CcKTh9Ov5F5x1u/NwcldvDed/gCh54o39Z4PHrAuhdM8fdE+qktenXZkWkpQjVOmEg6wzySC5bpW/l/+kknStsTBs+ob9kCH8RjgB8+O+xFlTbfkj3oHgsNFk1ERhYh8pXPRRTIIRgWyNPAg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=TG7hL96k; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="TG7hL96k" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8F6801570; Mon, 21 Sep 2026 03:57:25 -0700 (PDT) Received: from e129823.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B11E63F86C; Mon, 21 Sep 2026 03:57:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1789988249; bh=ywGIUWe4eG9Fo7o6yUhrB9doRugWRJ87ez63n7dCtOo=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=TG7hL96k21J46PvtLC59HQcHZYmuTxx9rr3LlmBn3clj7nC0IKikp8QCrZXShJiox fJA0U5SPbxEnut2fgoLETk2PoTNcFpOzCPKxMO9mqeqjhO1uEMR7RAtABKtRMHEHQ0 b6ZmFs8B7G0JeikmhUafh8z+0+Is/vD6upLImixU= From: Yeoreum Yun Date: Mon, 21 Sep 2026 11:55:30 +0100 Subject: [PATCH 08/21] mm: vmscan: remove stack copy address of pud/pmd pass in walk_pud/pmd_range() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260921-dummy_ptxp3-v1-8-cd40cf68242e@arm.com> References: <20260921-dummy_ptxp3-v1-0-cd40cf68242e@arm.com> In-Reply-To: <20260921-dummy_ptxp3-v1-0-cd40cf68242e@arm.com> To: Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Catalin Marinas , Will Deacon , Arnd Bergmann , Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Johannes Weiner , David Hildenbrand , Michal Hocko , Lorenzo Stoakes , Tianrui Zhao , Bibo Mao , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonas Bonn , Stefan Kristiansson , Stafford Horne Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-openrisc@vger.kernel.org, Muhammad Usama Anjum , Yeoreum Yun X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1416; i=yeoreum.yun@arm.com; h=from:subject:message-id; bh=ywGIUWe4eG9Fo7o6yUhrB9doRugWRJ87ez63n7dCtOo=; b=owEB7QES/pANAwAKAW3Vw9FaxTEzAcsmYgBqsQ1ONrk530uquKqsKokVTVRoFTxsseBHhNflE f+mOH3t5ViJAbMEAAEKAB0WIQQtg+CS3QUzuFh1pJ1t1cPRWsUxMwUCarENTgAKCRBt1cPRWsUx M6i5C/4jxR695g+aGeGrIAp5Hq3EK+JsBl4Xkw64Rh+MB3TRHC7oHN9GqMwjA0R8KVzPNX4iDSb opQlxOkF6mlSjUJGYxtqS1/XQG7tmGB0boaY6gUG0tIPmXOnfHwRWhoUKxqSVO71aiHCKtMDHx3 bvrSwgP3w3zc8ggNJdnUy0wQcByFeJFXtAC1548O4Arfhb/ldpChjkVK3Ttsmgib2gqXAlb7o7e 9kQEaAz1xbJx7+O2HbWqlXUHkPJFlrsGFKRoGNPmv+WuUmj9QEtHRlA1kSF54i0Omq+aH1S2gwL 2LgEZ9bPoknyuFN6E9vrtpQYA1cCcuMTcUiDtUbwVryNrTwccRxsgqHoeJstzUoQ56opOp8sTAF Pb7joEtKSjOyjqcbbb/o2KTzQKHOb0DIdBIOTo6cAmoMHyo+NbTIe28IZaY5snJlAQuUdvNKFNo qjJD+aHKgVLGvNKvkeq2VdMiw2jy3gEJ6IWGuxArucd2EPLm46Ivh5Ej3meNBg4nU8tb0= X-Developer-Key: i=yeoreum.yun@arm.com; a=openpgp; fpr=2D83E092DD0533B85875A49D6DD5C3D15AC53133 The behaviour of pXdp_get() will change with generic compile-time folded page tables. To prepare for that, replace passing the address of a stack copy of a pud/pmd to walk_pmd/pte_range() with passing the pud/pmd pointer directly so that makes allowing folded entries to be ignored and check the concurrent access proeprly otherwise pXd_same() would return always true. There should be no functional change. Reviewed-by: Muhammad Usama Anjum Signed-off-by: Yeoreum Yun --- mm/vmscan.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 836f50814ffae..f771443cd78b6 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -3871,7 +3871,7 @@ static void walk_pmd_range(pud_t *pud, unsigned long start, unsigned long end, walk->mm_stats[MM_NONLEAF_FOUND]++; - if (!walk_pte_range(&val, addr, next, args)) + if (!walk_pte_range(pmd + i, addr, next, args)) continue; walk->mm_stats[MM_NONLEAF_ADDED]++; @@ -3907,7 +3907,7 @@ static int walk_pud_range(p4d_t *p4d, unsigned long start, unsigned long end, if (!pud_present(val) || WARN_ON_ONCE(pud_leaf(val))) continue; - walk_pmd_range(&val, addr, next, args); + walk_pmd_range(pud + i, addr, next, args); if (need_resched() || walk->batched >= MAX_LRU_BATCH) { end = (addr | ~PUD_MASK) + 1; -- 2.43.0